The SureFire 317LM replaces the original forend of your Benelli M1 or M2 shotgun. Extremely compact 3-volt (1-battery) system features a virtually indestructible LED emitter focused by a TIR lens, which produces a brilliant beam optimized for close- to medium range applications. Two switches are integrated into the forend: a momentary-on pressure pad switch (right side) and a constant-on rocker switch (left side). The 317LM generates 100 lumens of output and has a tactical runtime of 1.4 hours per battery, with gradually decreasing output afterward. The tough polymer body features a molded-in high-friction pad for enhanced grip in wet or cold conditions. Fits: Benelli M1 (serial numbers above M104800) and M2 shotguns